Chinese Optics Letters, 2012, 10 (4): 040603, Published Online: Jan. 5, 2012
Sensitivity enhancement of distributed polarization coupling detection in Hi-Bi fibers
060.2420 Fibers, polarization-maintaining 070.2025 Discrete optical signal processing 060.2300 Fiber measurements 120.3180 Interferometry
Abstract
The intensity and position of the coupling points in high birefringence (Hi-Bi) fibers can be detected effectively using distributed polarization coupling (DPC) detection. The detection sensitivity can decrease due to mechanical vibration disturbance and environment noise. Thus, a method based on empirical mode decomposition is proposed to detect weak mode coupling points. The simulation and experimental results illustrate that the proposed method can suppress the noise effectively and improve sensitivity significantly. The method can identify coupling points as weak as -60 dB embedded in noise automatically and effectively. The algorithm is applicable for DPC, and the experimental sensitivity is improved by 10 dB.
Hongxia Zhang, Wenting Ye, Dagong Jia, Yimo Zhang. Sensitivity enhancement of distributed polarization coupling detection in Hi-Bi fibers[J]. Chinese Optics Letters, 2012, 10(4): 040603.